| Mayanja | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Uganda |
| Length: | 150km (90miles) |
| Source1: | Wakiso Hills, Wakiso District |
| Source1 Location: | Wakiso, Central Region, Uganda |
| Source1 Coordinates: | 0.41°N 32.52°W |
| Source1 Elevation: | 1140m (3,740feet) |
| Mouth: | River Kafu, Nakaseke District |
| Mouth Location: | Ndede, Central Region, Uganda |
| Mouth Coordinates: | 1.3575°N 31.82°W |
| Mouth Elevation: | 1000m (3,000feet) |
River Mayanja is a river in Uganda, East Africa.
The Mayanja River is located in Central Uganda. It starts from the hills, northeast of the town of Wakiso, in Wakiso District, Central Uganda and flows in a northwestern direction to empty into River Kafu, Nakaseke District at its border with Masindi District and Kyankwanzi District.
The source of River Mayanja is located in Wakiso, with coordinates: Latitude:0.41000, 32.52000. River Mayanja enters River Kafu near the village of Ndede, in Nakaseke District, with coordinates: Latitude:1.3575; Longitude:31.8200.
On its course northwestwards, the river traverses or forms the borders of the following districts : Wakiso District, Mpigi District, Kiboga District, Kyankwanzi District and Nakaseke District. At its source, the altitude is approximately 1140m (3,740feet). At its point of entry into River Kafu, the altitude is approximately 1000m (3,000feet). The length of River Mayanja, is approximately 150km (90miles) from source to end.[1]